<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="vue/vue.js" charset="utf-8"></script>

</head>
<body>

<div id="app">
    <input type="text" v-model="msg">
    <br>
</div>

<script>
    new Vue({
        el:'#app',
        data:{
            msg:"asdasd"
        }
    })
</script>

</body>
</html>